Pulverizer



G. E. BEAR PULVERIZER Filed May 10 1926 5 Sheets-Sheet 1 wEE-.FEFC-EEFCELE ATTORNEY G. E. BEAR PULVERIZER spt. 24, 1929.

Filed May 10, 1926 3 Sheets-Sheet 2 NVENTOR W' BY 8a ATTORNEY WITNESS/wim Sept. 24, 1929. G. E. BEARy 1,729,471

runvnnrzmz Filed may 1o, 192e s sheets-sheet :s

E WVI'NESSKm"i 'P'.'fenfea sept 24, 192e' IUNITED STATES 'einem E. BEAR, or 'ALLENTowm rENNsYLvANIA- rULvnnIzna Application led May 10, 1926. Serial No. 108,131'.

y This invention relates to a pulverizing device, the general object of the invention being to provide a device of this nature which will act to convey the material from one point to another at the same time the material is being'ground so that the grinding zone extends over a large area.

Another object of the invention is to so construct the device that the grinding area 1o is increased in proportion to. the fineness acquired. V

A further object of the invention is to provide a fan chamber for receiving the ground material from the grinding means, the

fan in which acts toagitate the material and also facilitates the passage of the material from the discharge of the fan casing.

Still another object of the invention is to provide-means for taking u wear of the '20 parts and spring means for hol lng the grinding menber against its die.

Another object of the invention is to make the grinding member in the shape of a frustum of a cone, the small end of which is provided with a helicoidal screw, the depth of the flight of which varies from a given depth to zero, with the rear portion of the cone plain.

This invention also consists in certain other features of construction and in the combination and arrangement of the several parts, to be hereinafter fully described, illustrated -in the accompanying drawings .and specifically pointed out in the appended claims.

In describing my invention in detail, ref erence will be had to the accompanying drawings, wherein like characters denote like or corresponding parts throughout the several ,views, and in which:-

Figure 1 is a side view of the apparatus.

Figure 2 is a view of the outlet end of the apparatus.

Figure 3 is a section on line 3-13 of Figure 1.

Figure 4 is a section on line 4 4 of Fig.- ure 2.

In these views, 1 indicates a base upon which is supported the conical housing 2 which is formed in sections so that the upper 50 section can be removed to provide access to the interior. This housing is made in the shape of a frustum of a cone and has one end closed by an end plate 3 and its other end has attached thereto a fan housing 4, the end of which is closed by an end plate 5. A shaft 6 passes. throughv the two houslngs and the end plates and is supported in the bearings 7 carried by the uprights 8 formed on the base. Each end plate is provided with a. packing gland 9 for the shaft. A section-al die 10 is arranged in the housing 2 and is held against rotary movement therein by means of the lugs 11 on vthe die engaging recesses in the housing. A ring 12 is arranged in the housing 4 and has one edge abutting the die 10. Bolts 13, carried by the end plate 5, engage the other edge of p the ring 12 so that the die can be adjusted in the housing 2 and prevented from having play due to wear. A hopper 14 is in communication with the small end of the housing 2 and a discharge 15 is arranged in the bottom of the fan housing. A slide 16 in the hopper controls the feed of material therethrough.

A grinding cone 17 is arranged in the housing 2 and is fastened to the shaft by means of a step block 18 which is keyed to the shaft. This block engages a recess in the large end of the cone. lThis grinding cone is the shape of a frustum of acone and its small end is formedwith a helicoidal screw 19, the depth of the flight of which varies from a given depth at the small end to zero at about the center of the cone, the remaining portion of the cone being plain.

A fan 20 is fastened to the shaft and is arranged` in the housing 4, and a coiled spring 21 is arranged o n the shaft and has one end bearing against the hub of the fan and its other end against a plate 22 having a' hole. therein through which the shaft passes, the

' said plate bearing against the end plate 5 but being adjusted on the shaft through means of the set screws 23. Thus the ate and its set screws permit the tension o the sprlng to be adjusted and these parts also act to provide means for taking up wear between the cone and its'die. f

A pipe 24 is in communication with the fan chamber 4 and is connected to a source of 100 -compressed air so that this compressed air can be used to help the fan discharge the ground material from the fan casing. This arrangement will also be useful in cases where the ground material is to be lifted or conveyed to a distant point and where the material ground is to be consumed in a furnace, the compressed air will aid combustion.

The fan chamber is also provided with holes covered by removable plates 25 so that access to the fan chamber can be had by removing the plates.

Any desired means can be used to drive the shaft 6, the drawings showing the shaft provided with a pulley 26.

From the foregoing, it will be seen that the material passing into the device through the hopper 14 will first engage the screw part of the grinding cone and then as the material is fed along the device by this screw, it will be broken up through contact with l the die, and as the screw gradually decreases in depth until it mergesjnthe plain portion of the cone, the material will be gradually ground to a powder. The ground material will then pass into the fan casing where it will be acted on by the fan and discharged through the opening 15.

As before stated, in this machine the material travels along between the grinding surfaces as it is being ground and theo grinding area is increased in proportion to the fineness acquired. The spring gives the grinding cone flexibility and prevents damage to the parts should any forei n material get into the machine. The disc arge plate 5 is ribbed, as shown, so that it has great strength to take the heavy horizontal thrust of the parts. By adjusting the spring, the fineness of the iinished product is regulated and it alsoA acts as means for takin up wear on both the grinding cone and ie.

It is thought from'the foregoing description that the advantages and novel features of my invention will be readily apparent.

I desire it to be understood that I may make changes in the construction and in the combination and arrangement of the several parts, provided that such changes fall with- 1n the scope of the appended claims.

What I claim is A pulverizer of the class described comprlslng a frusta-conical housing closed at one end, a die lining the same, a grinding cone within the chamber and having a helicoidal screw on its small end, means for rotating the cone, a fan chamber communicating with the large end of the first mentioned chamber and including an end plate, a ring arranged within the fan chamber and having one end bearing against said die, bolts ad- ]ustably supported upon said end plate and adapted to engage the other end of said ring to effect anadjustment of the die and thus prevent misplay due to wear.

2. A'pulverizer of the class described comprising a frusto-conical chamber, a die lining thereof and thereby regulate the tension of said spring. v

In testimony whereof I affix my signature.

GROVER E. BEAR, 

